Thread-severing mechanism for sewing-machines



A. HQ DE VOEJ THREAD SEVERING MECHANISM FOR SEWING-MACHINES.nrPucmou'r'lLsn'uov, 27. m7, 1,401,465; Patented Dec. 27, 1921.

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A. H. DE VOE. THREAD SEVERING MECHANISM FOR SEWING MACHINES. APPLICATIONFILED Nov. 27. 1917. 1 4 .1 4 5 Patented Dec. 27, 1921.

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UNITED STATES PATENT OFFICE.

ALBERT H. DE VOE, 0F WE$TFIELD, NEW JERSEY, ASSIGNOR TO THE SINGER MANU-FAGTURING COMPANY, A CORPORATION OF NEW JERSEY.

THREAD-SEVER ING MECHANISM FOR SEWING-MACHINES.

To all whom it may concern:

Be it known that I, Atnaa'r H. DE Von, a citizen of the United States,residin at Westfield in the county of Union and btate of New jersey,have invented certain new and useful Improvements in Thread-Seven ingMechanisms for Sewin -Machines, of which the following is aspecification, reference being had therein to the accompanying drawings.y

This invention relates to thread-severing mechanism for sewing machines,more par ticularly of the chain-stitch type, and has for an object toprovide simplified and ellicient means forsevering the stitching threadprior to the removal of the work, so that the appearance of the finishedwork will not be marred by a loose thread-end sticking up at the end ofthe seam.

A further object of the invention is to provide simplified needle-threadsevering mechanism which will pull or measure a length of thread fromthe supply through the eye of the needle prior to the threadseveringaction, in order that the end of thread left hanging from the needle maybe long enough to permit the starting of a new sewing operation.

A further object of the invention is to so construct the mechanism thatit will pull the beginning end of the needle-thread below the work. aStill further, the invention has for, an object to provide improvedpull-ofli and thread-severing mechanism which will pull oil and severthe stitching thread at the under side of the work and which will bemounted and operated independently of the throat-plate or cover-plate ofthe machine so that said plate or plates may be removed withoutdisturbing the cooperative relation of the stitch-forminginstrumentalities and thread pull-off and severing means, whereby themachine may be readily freed from an accumulation of lint or the likeand adjusted while the working parts, are under observation in theirnormal operative positions.

A still further object of the invention is to provide improvedthread-severing mechanism which is under manual control and may b throwninto action to pull off and sever the thread at the end of a sewingoperation and which will be automatically thrown out of operation at apredetermined time after the beginning of a new stitching fipecifioationof Letters Patent.

Patented Dec. 2'7, 1921.

Application filed November 27, 1917. Serial No. 204,143.

operation, preferably after the beginning end of the needle-thread hasbeen pulled down below the upper surface of the work.

Further objects of the invention will appear from the followingdescription and claims.

In the present instance the invention is embodied in a chain-stitchmachine having a pair of reciprocating needles and a corre sponding pairof thread-carrying loopers 00- operating with said needles to producetwo closely spaced rows of double chain-stitches; such machines beingcommonly used for stitching thumbs to gloves. The present ma chine isfitted with a raised work-plate to which is screwed a removablethroat-plate having the usual needle and feed-dog apertures. The loopersare sustained below the throat-plate upon a looper-carrier to whichoperative advancing and retracting move ments are imparted to cause theloopers to seize and shed the needle-loops and also to partake of theusual sidewise or needleavoiding movements.

The present thread-severing mechanism comprises pull-off and severinginstrumentalities mounted, preferably upon the loopercarrier, to partakeof the advancing and retracting movements of the loopers. During asewing operation these implements occupy an inoperative position, spacedbelow the looper-blades so as not to interfere with the threads handledby said looper-blades. When it is desired to sever the stitching thread,in the present instance the needlethreads, the thread-severingimplements are moved to operative position, preferably through theaction of a manually controlled lever and, duringa subsequent advance ofthe loopers, seize and spread the needlethrcad loops, thereby pulling ameasured amount of needle-thread from the supply through the eyes of therespective needles. The threadsevering action preferably occurs at alater stage or during the retraction of the loopers. Automatic means arepreferably provided for shifting the threadsevering implements toineffective position at a predetermined time after the beginning of anew stitching operation; preferably after said implements have acted topull down the beginning ends of the needlethreads.

In the accompanying drawings, Figure 1 a :front side elevation of amachine embodying the invention; the showing of the usual bracket-armbeing omitted. Fig. 2 is a bottom plan view of the machine. Fig. 3 is afront end elevation of the machine. Fig. at is a top plan view of theautomatic device for determining the time at which the severingmechanism will be thrown out of operation. Fig. is a cross section onthe line 5-5 of Fig. 1. Fig. 6 is a front side elevation of the loopersand the looper-carrier, showing the thread-severing implements mountedthereon. Fig. 7 is a perspective view illustrating the action of thepulloti implements and the presentation of the i'ieedle-tln'ead to thesevering means. Fig. 8 is a top plan iew of the looper-carrier and partsmounted thereon. Fig. 9 is an enlarged perspective view showing thespread ers in operative relation with the loopers. is a perspective viewof the loopspreading and thread-severing instrumentalities.

In the preferred embodiment of the invention, as illustrated, themachine frame comprises a bed 1 and standard 2 carrying the usualbracket-arm, not shown, which sustains the usual reciprocatingneedle-bar 3 fitted in the present instance with a pair of eye-pointedneedles 4 arranged diagonally of the line of seam, as shown in Figs. 1 3and 7, to produce two closely spaced rows of stitches. The presser-bar 5is sustained in the usual manner and carries a presser-foot 6 whichcooperates with the feed-dog 7 to feed the work.

The feed-dog operates through the usual feed-dog aperture 7 in thethroat-plate 8 which is screwed to the raised work-plate 9 carryingslide-plates 10 and 11, Fig. 1; said slideplates being shiftable in thedirections indicated to expose the mechanism thereunder.

Cooperating with the needles are looptaking means preferably in the formof thread-carrying loopers 12 and 12 which are mounted upon alooper-carrier comprising a head 13 and a depending sleeve 14 carrying apin 15 directed preferably at right angles to the sleeve 14 and fittedto rock and slide within the apertured boss 16 formed on the bed 1. Theaxes of the sleeve 14 and pin 15 preferably intersect.

Fitted within the sleeve 14 is a smaller sleeve 17 to the lowerprojecting end-portion of which is clamped the split hub of a bracket 18carrying a pin 19 directed pref- 'erably at right angles to the sleeve17. The

axes of the pin 19 and sleeve 17 preferably intersect at a point spacedfrom the point of axial intersection of the sleeve 14; and pin 15.

The loopers are of the usual four-motion type and are actuated from themain-shaft 2O journaled below the cloth-plate 9 and carrying acrank-sleeve 20 which embraces the pin 19 and the axis oi. which isinclined to and preferably intersects the axis of the main-shaft.Through the above described connections, rotation of the main-shaft willcause the loopers to perform their usual endwise reciprocatoryloop-seizing and shedding movements and lateral or needle-avoidingmovements.

The thread-severing mechanism comprises thread-engaging and severinginstrumentalities mounted independently of the throatplate and adaptedto partake of the loopseizing and shedding movements of the loop ers.Slidably fitted within the sleeve 17 is a rod 21 which forms thesupporting shank of a carrier 22 in the form of a rectangulablocknormally seated within a recess 23 in the top of the head 13 of theleopcr-carricr. The carrier 22 for the thread-severing iniplements isformed at one end with a head 23 to which is secured the shank 21 of theloop-spreading and severing implement 2? whose pointed and upturnedextremity 26 is normally spaced below the looper 12 as shown in Figs. 3and G. The implement 2:3 is preferably in the form of a flat blade whichis widened out toward its rearward or shank end so that it will spreadthe. needle-loop and pull of? the nee illc-thread from the supply. Theimplement 255 is notched to form a thread-severing edge 27 which ispreferably sharpened to cut the thread clean at this point during theretracting stroke of the loopcr.

Secured to the head 23 is the shank 28 o an outwardly bowedloop-spreading implement 29, Figs. 7 and 10, the pointed and ill)-turned extremity 30 of which is normally spaced below the looper 12 asshown in. Figs. 3 and 6. Secured to the head 23, along with thespreading implement 29, is a severing implement 31 having athread-dcileeting edge 32 and notched to form a thrcad-f-cvee ing edge33 which is preferably sharpened.

to cut the thread during the retraction ol the loopers.

The carrier 22 is adapted to be elevated. in the present instance bymanually controlled means, for the purpose ol' projecting, theextremities 26 and 30 of the loop-spreadlu implements 25 and 29 into therecesses 2H- and 35 formed respectively in the under surfaces of theloopers 12 and 12. A stop 36 secured to the head 13 of thelooper-carrier and overhanging the cutter-carrier prevents excessiveupward displacement at the latter. The cutter-carrier 22 is normallyretained in its seat 23 in the looper-carricr by means of the spring 37,Fig. 6, which surrounds the lower projecting end 01": the rod 21 andbears downwardly against the collar 38 secured to said rod. The spring37 1e acts against the lower end of the sleeve 17.

Disposed below and close to the curved path oi" mowmcnt of the lowerextremity of l lo llti

the rod 21 is a curved plate 39 having its center of curvaturesubstantially coincident with the axis of the pin 15 when in erative ordotted line pos1tion,Fig. 6,.and mm 5 ing the operative end of acutter-lifting arm 46 clamped to therock-shaft 41 which is 'ournaled insuitablebearings beneath the ed 1 and is formed with an offset portion42, shown best in Fig. 2. Secured to the shaft 41 isa collar thenlargedand socketed at one side to receive a pin 44 which is held in place bythe set-screw 45 and projects Epgvardly through an aperture 44 in theThe manually controlled means for rocking the shaft 41 to elevate theloop-spreading and severing implements to operative osition comprise, inthe present instance, a hand-lever 46 mounted on the fulcrum-shaft 2 47which is journaled in the bearin boss 48 at the upper side of the bed 1.The andlever 46 is formed at its upper end with a a rectangular fingeror push-plate 49 and at its lower end with a cam nose 50, which, whenthe finger-plate 49 is pushed inwardly, engages and forces the pin 44outwardly or toward the right, Fig. 3, thereby rocking the shaft 41 andelevating the curved plate 39 to move or lift the cutter carrier 22 andimplements sustained thereby into operative osition. The manuallycontrolled means or moving the threadsevering device to operativeposition is not intended to be limited to. a manually operated lever orelement whose sole function is to throw the thread-severin mechanisminto operation, but is intende to cover broadly any means under thecontrol of the operator which acts to throw the threadeevering mechanisminto action at the will of the operator.

Journaled in the lever 46 is the pin 50 forming the shank of thethrust-block 5 carryin U a lateral pin 52 which is surrounde b theexpansion spring 53, the in- 4b ner end 0 which is mounted within therecess 54 in the. support 65 for the cloth-plate 9. Secured to the andof the fulcrum-shaft 47 remote from the lever 46 is a collar 56 having aperipheral recess 57 which re- 50 ceives an upwardly spring-pressedstop-pin 58, Fig. 5, slidabl fitted within a suitable aperture in thebe 1. :The end walls of the recess 57 are adapted to strike the stop-pini 58 and limit the movement of the handlever 46. a Asa means forretaining the pull-off and thread-severing implements in operativeosition until they have performed their unctions, the followingmechanism is pro- Screwed to the oflse rtion 42 of the -shaft 41 is asupportin h ock 59 to the side 60 of which is pivoted y means of ascrewpin 61 thelatehorm 62 which extends up- 6 wardly within thestandard 2 and at its the retracting a cylindrical hub 66 having an endface 67, alreduced hub extension 68 and carrymg a square thread 69 whichextends spirally around the hub 66 and defines a spiral groove 70 havingin the present instance a length equal to about two times the 011'cumference of the hub 66. The hub 66 is formed at the end opposite thereduced hub extension 68 with a flange 71 of larger diameter than thethread 69 and having an end face 72.

When the hand-lever 46 is pushed inwardly to elevate the loop-spreadingand severing implements, the latch-arm 62 is shifted outwardly or awayfrom the mainshaft 20 thereby withdrawin the pin 63 beyond the maximumcircum crence of the thread 69 and allowing the spring 64 to urge thelever 62 to full line position, Fig. 4, in which latter position theside of the pin 63 bears against the end face 72 of the flange 71 whilethe end of the pin 63 bears against the cylindrical surface 73 atthebeginning end of the spiral groove 70 and prevents the return of therock-shaft 41 to initial position. The loop-spreading and severingimplements are therefore retained in operative position with the points26 and 30 well buried within the recesses 34 and 35. It may be stated atthis time that the receases 34 and 35 are preferably made large enoughto loosely receive the points 26 and 30 so that in case the device isthrown into operation when the loopers are in the needleloops, saidloops may slip past the points 26 and 30 and be shed by the loopersduring stroke of the loopers.

As the mam-shaft turns in the direction indicated by the arrow from theposition shown in Fig. 4, the pin 63 will drop into the beginning end ofthe groove 70 and in so doing will permit a rockm movement of the shaft41 under the expansive force of the spring 37. During this movement,however, the points 26 and 30 will not be withdrawn from the shieldingrecesses 34 and 35 in the loopers 12 and 12. Further movement of themain-shaft will carry the pin 63 to the end of the groove 7 0 whereuponit will move inwardly into engagement with the reduced hub extension 68and in so doing will permit a further rockin movement of the shaft 41 asthe spring 37 s ifts the loop-spreading and severing implements fromdotted line or operative position, Fig. 6, to full line or inoperativeposition.

The present mechanism is described as applied to a machine which is notequippet with a stop-motion device and, while it may be operated invarious ways at the election of the operator, is preferably operated asfollows Starting with the machine stitching a seam, the cutter-carrier22 in inoperative position and the latch-arm 62 in full line position,Fig. l, the machine is stopped by the operator as usual at the end ofthe seam preferably with the'loopers in extreme retracted position Fig.6. The operator now pushes inwardly upon the plate 49 thereby shiftingor elevating the loop-spreading implements to operative .'position withthe points 26 and 30 within the recesses 34 and of the loopers. Thelatch-arm 62 snaps into full line position, Fig. 4t, and retains theloop-spreading and severing implements inoperative position.

The operator now preferably causes the machine to turn over in a forwarddirection to project the loopers into the needle-loops which are thencaught by the implements 25 and 29 and spread open as shown in Fig. 7the excess thread required being pulled from the supply through the eyesof the needles. At-the end of this forward movement of the loopers theneedle-loops have been fully spread and the limbs of said loops whichlead to the last stitch have been so directed as to slip behind thesharpened thread-cutting edges 27 and 33. Continued movement of themain-shaft effects the retraction of the loopersand thesevering of theneedle-thread loops by the cutting edges 27 and 33 at points such thatplenty of thread is left hanging from the eyes of the needles to permitthe machine to start sewing at the beginning of a new stitchingoperation. I

After the severing of the needle-thread has been effected the operatormay turn the main-shaft backwardly a half-revolution to elevate theneedles, whereupon the work may be readily removed from the machine; thesevered ends of the thread being disposed at the under side of the work.

New work having been inserted beneath the presser-foot, the machine isstarted and during the first upstroke of the needle the implements 25and 29 in spreading the initial needle-loops serve to draw the beginning ends of the stitching threads downwa-rdly below the work. Duringthe second down stroke of the needles, while the loopers are retracting,the pin 63 rides out of the end of the groove and moves inwardly intocontact with the hub extension 68, thereby permitting the spring- 37 toshift the loop-spreading and severing implements to inoperativeposition.

Y It is to be understood thatthe machine need not be turned backwardlyto elevate the needles after the thread has been screred for removal ofthe work, but may be turned forwardly a half revolution to accomplishthis purpose. In the latter event, however, the thread (39 of thethrow-out screw should be made one revolution longer in order tomaintain control of the pin 01-) until the initial thread end has beendrawn down below the work at the beginning of a new stitching operation,or the throwout screw shown and described may be used in this lattercase provided the device is not thrown into operation until after theloopers have started forwardly and the beginning end of the groove 70has passed the follower pin 63, thereby causing said pin to ride uponthe cylindrical surface 7301' the controlling screw 'for practically anentire revolution of the main-shaft 20 before dropping into said groove.

It is to be further understood that the present mechanism may be throwninto ac tion at any time during a cycle of operations without stoppingthe machine or before stopping the machine. If thrown into 2H" tionwhile the machine is running, the machine may subsequently be brought torest in any desired manner, after the thread has been severed and theneedles have emerged from the work; the particular means employed tostop the machine being immaterial to the present invention. If thedevice is thrown into action and the machine is not subsequently broughtto rest, the needle-thread will be severed below the work and thebeginning end of the needle-thread will be drawn down, after which themachine will continue stitching, having left a gap in the stitching atthe upper side of the seam at the point where the thread-severingmechanism was thrown into operation. If the machine is not provided witha stop mechanism, the threadsevering device may be thrown into actionafter the machine has been slowed down by the operator but is stillrunning. After the thread has been severed and the needles raiser fromthe work the machine may be stopped and the work removed.

By virtue of the present construction, the slide-plates 10 and 11 andthroat-plate 8 may be readily removed without disarrangingthe workingpositions of the parts. Therefore, the machine may be easily cleaned andthe operation of the various tl1read-ha1nlling implements may be readilyobserved and critical adjustments may be made, if necessary, while theparts are under observation in normal working position on the bench.This is an important desideratum in machines intended for present dayfactory use where production is being specded up as much as possible andmachines must be kept running with a minimum loss of time.

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n will be obvious that the present improvement is useful in singleneedle ma in the formation of enchained thread-loops,

a normally inefiiective thread-severing implement mounted to partake ofthe advancing andretracting movements of the looper, and means forrendering said implement efi'ective to sever the needle-thread.

2. Ina sewing machine, in combination, a reciprocating needle, a looper,means for imparting advancing nd retracting loopseizing and sheddingmovements to said looper in the formation of enchained threadloops, anormally i lfiective thread-severm implement mounted to partake of the avancing and retracting movements of the loopeigand means for renderingsaid implement effective to sever the needle-thread without stopping themachine.

3. In a sewing machine, in combination, a reciprocating needle, alooper, means for imparting advancing and retracting loopseizing andshedding movements to said looper in the formation of enehainbdthreadloops, a normally ineffective thread-severing mechanism includinga threadengaging implement mounted to advance and retract with thelooper, and means for moving said implement to efiiective position tocause the severance of the needle-thread.

4. In a sewing machine, in combination, a reciprocating needle, aloop-taker cooperating therewith to concatenate thread-loops,

. actuating means for said nee le and looptaker and needle-loopspreading and severing means mounted to partake of movements of saidloop-taker and movable relatively to said loop-taker from inoperative.to operative position.

5. In a sewing machine, in combination, a recipmcating needle, aloop-taker inoperating therewith to concatenate thread-loops, actuatingmeans for said needle and looptaker, needle-loop spreading means mountedto partake of movements of said loop-taker and also movablenelatively tothe latter from inoperative to operative position, and

means for severing the spread needle-loop.

6. In a sewing achine, in combination, a recip a eeds a -m on lo pactuat', meansfor said needle and loops! and no la-thread severing meansmen to partake of the advancing and retracting movements of said looper.

7, A sewing machine having in combine,

occupying a normally inefi'ective position tion, a reciprocating needle,areciprocating looper cooperating therewith to form fastening stitches,and a thread-severing device mounted to reciprocate with said looper andoccupying a normally inoperative position relative to said looper Whilethe machine is in operation, and means for moving said device tooperative position relative to said looper to sever the needle-thread.

8. A sewing machine having in combination, a reciprocating needle, areci Jrocating looper cooperating therewith to orm fa s toning stitches,and thread-severing means mounted to reciprocate with said looper andWhile the machine is in operation, and means for directing a needle-loopto said severing means.

9. A sewing machine having in combination, a reciprocating needle, areciprocating looper cooperating therewith to form fasten,- ingstitches, and a thread-severing device mounted to reciprocate with saidlooper and occupying a normally ineffective position relative to saidlooper, and means for mov ing said device to operative position relativeto said looper to sever the needle-thread while the machine is inoperation.

10. In a sewing machine, in combination, a reciprocating needle, alooper cooperating therewith to form fastening stitches, alooper-carrier, means for imparting to-andfro movements to saidlooper-carrier to move said looper into and out of a needleloop, and athread-severing implement mounted upon said looper-carrier in a 1101'-mally inoperative position relative to said looper and adapted to severthe stitching thread when shifted to operative position relative to saidlooper.

11. In a sewing machine, in combination, a reciprocating needle, :1,looper cooperating therewith to form fastening stitches, a:looper-carrier, means for imparting to-andfro movements to saidlooper-carrier to move said looper into and out of the needle-loops, andneedle-thread pull'ofi' and severing means mounted to partake of themovements of the looper.

12. A chainstitch sewing, machine having, 1 in, combination, areciprocating needle, a looper, means including a looper-carrier forimpartingadvancing and retracting movements to Said looper, aneedle-thread severing device movably mounted. on said loopercarrier andadapted. to occupy an inoperative sition while the machine is operatingto orm a lineof fastening stitches, and means for moving saidthread-severing device to operative position.

13. A chain-stitch sewing machine having, in combination, areciprocating needle, a looper, means including a looper-carrier forimparting advancing and retractin move ments to said looper, a needlethrea severing device movably mounted on said loopercarrier andincluding a thread-engaging element adapted to occupy an inoperativeposition while the machine is forming a line of fastening stitches, andmanually controlled means for moving said thread-engaging element tooperative position.

14. A chain-stitch sewing machine having, in combination, areciprocating needle, a looper, means including a looper-carrier forimparting advancing and retracting movements to said looper, aneedle-loop spreading and severing implement movably mounted on saidlooper-carrier and adapted to occupy an inoperative position while themachine is forming a line of fastening stitches, and means for movingsaid implement to spread and sever a needle-loop seized by said looper.

15. A chain-stitch sewing machine having, in combination, areciprocating needle, a looper, means including a looper-carrier forimparting advancing and retracting movements to said looper, meansmoving with the looper in its advancing stroke for entering andspreading the needle-loop seized by the looper, and means for severingone limb only of the spread needle-loop.

16. A chain-stitch sewingmachine having, in combination, a reciprocatingeye-pointed needle, a thread-carrying looper cooperating therewith toseize and shed needle-loops in the formation of fastening stitches,actuating means for said needle and looper, and means moving with thelooper to sever one limb only of the last needle thread-loop.

17. A chain-stitch sewing machine having, in combination, areciprocating needle, a thread-carrying looper, actuating means for saidneedle and looper, and means moving in fixed relation with the looper tosever one limb only of the needle-loop.

18. A chain-stitch sewing machine having, in combination, areciprocating needle, a looper, means including a reciprocatingooper-carrier for imparting advancing and retracting movements to saidlooper, means normally inoperative during the stitching for spreadingthe last needle-loop seized by the looper, and means for severing onelimb only of said spread needle-loop, said 'loopspreading and severingmeans being mounted to partake of the movements of the looper.

19. Achain-stitch machine having, in combination, a throat-plate, areciprocating needle, a looper cooperating with said needle below said"throat-plate to form fastening stitches, thread severing means mountedindependently of said throat-plate for movement relatively to saidlooper, and a connection between said means and a. moving part of themachine for shifting said means to cause the severance of one limb onlyof the needle-thread. a

20. A chain-stitch machine having, in combination, a throat-plate, areciprocating needle, a reciprocating looper cooperating with saidneedle below said throat-plate to form fastening stitches, andneedle-thread pull-off and severing means mounted upon a moving part ofthe machine and adapted when thrown into operation to first pull oil andthen sever the needle-thread.

21. In a sewing machine adapted to sew the first stitch with a free endof thread hanging from the needle, in combination, a reciprocatingneedle, a loop-taker cooperating therewith to form fastening stitches,actuating means for driving said needle and. loop-taker, andneedle-thread pull-oil and severing means mounted in a normallyineffective position upon a moving carrier part of the machine andshiltable to a position effective to pull off and sever theneedle-thread during movement of said carrier part.

22. In a sewing machine adapted to sew the first stitch with a free endof thread hanging from the needle, in combination, a reciprocatingneedle, a loop-taker cooperating therewith to form fastening stitches,actuating means for driving said needle and loop-taker, and manuallycontrolled needlethread pull-oif and severing means mounted in anormally ineifective position upon a moving carrier part of the machineand acting when thrown into operation to pull off and sever theneedle-thread during movement of said carrier part.

23. In a sewing machine adapted to sew the first stitch with a free endof thread hanging from the needle, in combination, a reciprocatingneedle, a loop-taker cooperating therewith to form fastening stitches,actuating means for driving said needle and loop-taker, manuallycontrolled needlethread pull-ofi' and severing means mounted in anormally ineffective position upon a moving carrier part of the machineand acting when thrown into operation to pull oil and sever theneedle-thread during movement of said carrier part, and automaticmechanism for throwing said pull-oil and severing means out ofoperation.

24. In a sewing machine, in combination, a reciprocating needle, alooper-blade having a recess, actuating means for said needle andlooper-blade, a loop-s n'eading implement mounted to move with said.looperblade and having a beak adapted to enter said recess, and meansfor severing the spread needle-loop.

25. In a sewing machine, in combination, a reciprocating needle, alooper cooperating therewith to form a line of fastening stitches, alooper-carrier, a needleloop spreader, movably mounted upon saidloopercarrier and occupying an ineflective position during the sewing,means for shifting said needle-loop spreader relative to said looper toposition said spreader for entry into the last needle loop seized bysaid looper, and means for severing the spread needle-loop.

26. In a sewing machine, in combination, a reciprocating needle, alooper having a blade cooperating with said needle to form a line offastening stitches, a thread-severing implement moving with the looperin an inoperative osition during the sewing, and means for s liftingsaid implement into cooperative relation with the looper-blade to enterand spread the last needle-loop along with said looper-blade andsubsequently sever one limb of said loop.

27. In a sewing machine, a feeding mechanism, a reciprocating needleelement, a moving loop-taker element cooperating with the needle elementto sew a line of fastening stitches, a thread-cutter mounted to partakeof motion of one of said elements and occupying an ineifective positionduring the sewing, and means for imparting a second motion to saidthread-cutter without interrupting its first mentioned motion to move ittoa position wherein it will operate to cut the sewing thread.

28. In a sewing machine, a feeding mechanism, a reciprocating needleelement, a moving loop-taker element cooperating with the needle elementto sew a line of fastening stitches, a thread-cutter performing a cycleof motion for each stitch-forming cycle but occupying a position duringthe sewin such that the thread is beyond its range of action, and meansfor moving the thread-cutter to a position wherein it will catch andsever the thread prior to stoppage of the machine in its stitch-formingmotion.

In testimony whereof, I have signed my name to this specification.

ALBERT HfnE VOE..

